* src/output.c (table_size, table_grow): New.

[bison.git] / src / reduce.c

diff --git a/src/reduce.c b/src/reduce.c
index ba605df4c04b8843cb8af4724acb951a5b762eb9..c8a8fe710bdf6fb3b41b717e8007a72341664d14 100644 (file)
--- a/src/reduce.c
+++ b/src/reduce.c
@@ -37,9 +37,6 @@
 #include "getargs.h"
 #include "bitset.h"
 
-typedef short *rule;
-
-
 /* Set of all nonterminals which are not useless.  */
 static bitset N;
 
@@ -67,7 +64,7 @@ int nuseless_nonterminals;
 static bool
 useful_production (int i, bitset N0)
 {
-  rule r;
+  item_number_t *r;
   short n;
 
   /* A production is useful if all of the nonterminals in its appear
@@ -139,7 +136,7 @@ inaccessable_symbols (void)
   bitset Vp, Vs, Pp;
   int i;
   short t;
-  rule r;
+  item_number_t *r;
 
   /* Find out which productions are reachable and which symbols are
      used.  Starting with an empty set of productions and a set of
@@ -252,7 +249,7 @@ reduce_grammar_tables (void)
     /* Renumber the rules markers in RITEMS.  */
     for (i = 1; i < nrules + 1; ++i)
       {
-       short *rhsp = rules[i].rhs;
+       item_number_t *rhsp = rules[i].rhs;
        for (/* Nothing. */; *rhsp >= 0; ++rhsp)
          /* Nothing. */;
        *rhsp = -i;
@@ -269,7 +266,6 @@ reduce_grammar_tables (void)
       {
        length = rule_rhs_length (&rules[r]);
        nritems -= length + 1;
-       nitems -= length + 1;
       }
   }
 }
@@ -282,12 +278,12 @@ reduce_grammar_tables (void)
 static void
 nonterminals_reduce (void)
 {
-  int i, n;
+  token_number_t i, n;
 
   /* Map the nonterminals to their new index: useful first, useless
      afterwards.  Kept for later report.  */
 
-  short *nontermmap = XCALLOC (short, nvars) - ntokens;
+  token_number_t *nontermmap = XCALLOC (token_number_t, nvars) - ntokens;
   n = ntokens;
   for (i = ntokens; i < nsyms; i++)
     if (bitset_test (V, i))
@@ -312,7 +308,7 @@ nonterminals_reduce (void)
 
   for (i = 0; i < nritems; ++i)
     if (ISVAR (ritem[i]))
-      ritem[i] = nontermmap[ritem[i]];
+      ritem[i] = token_number_as_item_number (nontermmap[ritem[i]]);
 
   start_symbol = nontermmap[start_symbol];
 
@@ -362,7 +358,7 @@ reduce_output (FILE *out)
       fprintf (out, "%s\n\n", _("Useless rules:"));
       for (i = nrules + 1; i < nuseless_productions + nrules + 1; i++)
        {
-         rule r;
+         item_number_t *r;
          fprintf (out, "#%-4d  ", rules[i].user_number - 1);
          fprintf (out, "%s:", quotearg_style (escape_quoting_style,
                                               rules[i].lhs->tag));
@@ -379,12 +375,12 @@ static void
 dump_grammar (FILE *out)
 {
   int i;
-  rule r;
+  item_number_t *r;
 
   fprintf (out, "REDUCED GRAMMAR\n\n");
   fprintf (out,
-          "ntokens = %d, nvars = %d, nsyms = %d, nrules = %d, nitems = %d\n\n",
-          ntokens, nvars, nsyms, nrules, nitems);
+          "ntokens = %d, nvars = %d, nsyms = %d, nrules = %d, nritems = %d\n\n",
+          ntokens, nvars, nsyms, nrules, nritems);
   fprintf (out, "Variables\n---------\n\n");
   fprintf (out, "Value  Sprec  Sassoc  Tag\n");
   for (i = ntokens; i < nsyms; i++)
@@ -488,10 +484,13 @@ reduce_grammar (void)
     fatal (_("Start symbol %s does not derive any sentence"),
           quotearg_style (escape_quoting_style, symbols[start_symbol]->tag));
 
-  if (nuseless_productions > 0)
-    reduce_grammar_tables ();
+  /* First reduce the nonterminals, as they renumber themselves in the
+     whole grammar.  If you change the order, nonterms would be
+     renumbered only in the reduced grammar.  */
   if (nuseless_nonterminals > 0)
     nonterminals_reduce ();
+  if (nuseless_productions > 0)
+    reduce_grammar_tables ();
 
   if (trace_flag)
     {